I had the same problem usig ncsdk2 with movidus NCS 1 for the ncappzoo example code video_face_matcher.
The solution for me was commenting out the line the line 8
#import mvnc_simple_api as mvnc
and uncommenting the line 9
from mvnc impo…
You will need to remove the foreign architecture "arm64" as the binary-arm64 url does not exist in the unbuntu archoives for xenial-backports.
You can refer to the link https://askubuntu.com/questions/917081/how-to-get-rid-of-arm64-in-apt to get r…